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    <script>
        //使用set实现数组去重
        const arr = [1, 3, 4, 6, 3, 5, 7, 4, 6]
        // const set = new Set(arr);
        // const arr1 = [...set];
        // console.log(arr1);

        // 简化写法
        const arr1 = [...new Set(arr)];
        console.log(arr1);
    </script>

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